refactor: 外链中转拆为内置插件 neatstudio.link-tracker

- 插件承载全部逻辑：redirects 迁移（hasTable 兼容旧库）、Redirect 模型、UrlRedirector、/go 路由+控制器、Filament 外链中转资源
- 核心只留 hook 接入点：
  - tracked_url() 助手走 link.redirect 过滤器（评论正文/作者网址/友链模板统一调用）
  - 正文外链改写移到插件的 post.rendered 过滤器（优先级 20，晚于会员付费过滤）
- 停用插件：链接恢复直连、内容不受影响；后台「管理 → 外链中转」查看点击量/启停
- 测试更新为插件上下文（含无过滤器降级断言）；97 通过

app/Blog/Controllers/GoController.php

@@ -1,26 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Blog\Controllers;
-
-use App\Models\Redirect;
-
-class GoController
-{
-    /**
-     * 外链中转跳转：计数 + 302。停用的链接返回 410（可作二次拦截）。
-     */
-    public function show(string $hash)
-    {
-        $redirect = Redirect::query()->where('hash', $hash)->firstOrFail();
-
-        if (! $redirect->isActive()) {
-            abort(410);
-        }
-
-        $redirect->hit();
-
-        return redirect()->away($redirect->target_url, 302);
-    }
-}

app/Blog/Services/PostContentRenderer.php

@@ -46,31 +46,7 @@ class PostContentRenderer
         $html = app(\App\Blog\Support\PluginManager::class)->applyFilters('post.rendered', $html, $post);
 
         // 兜底：任何情况下不把裸 [paid] 标签输出到页面（如会员插件被停用时）
-        $html = preg_replace('/\[(\/?paid)\]/i', '', $html);
-
-        // 外链中转：站外链接改写为 /go/{hash}（点击统计/拦截）
-        return $this->rewriteExternalLinks($html);
-    }
-
-    /**
-     * 把正文里的站外 <a href> 改写为 /go 中转地址（站内/相对/锚点/mailto 不变）。
-     */
-    private function rewriteExternalLinks(string $html): string
-    {
-        return preg_replace_callback(
-            '/<a\s+([^>]*?href=["\'])([^"\']+)(["\'][^>]*)>(.*?)<\/a>/is',
-            function (array $m): string {
-                $url = html_entity_decode(trim($m[2]));
-                $go = go_url($url);
-
-                if ($go === $url) {
-                    return $m[0];
-                }
-
-                return '<a '.$m[1].e($go).$m[3].'>'.$m[4].'</a>';
-            },
-            $html
-        );
+        return preg_replace('/\[(\/?paid)\]/i', '', $html);
     }
 
     /**

app/Blog/Services/UrlRedirector.php

@@ -1,72 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Blog\Services;
-
-use App\Models\Redirect;
-use Illuminate\Database\UniqueConstraintViolationException;
-use Illuminate\Support\Facades\Cache;
-
-/**
- * 外链中转：把站外链接改写为 /go/{hash}，用于点击统计、二次拦截与未来广告位。
- * 站内链接、相对路径、mailto/tel/锚点不中转。
- */
-class UrlRedirector
-{
-    public function goUrl(string $url): string
-    {
-        $url = trim((string) $url);
-
-        if (! $this->isExternal($url)) {
-            return $url;
-        }
-
-        return route('go.show', $this->hashFor($url));
-    }
-
-    public function isExternal(string $url): bool
-    {
-        if (! preg_match('#^https?://#i', $url)) {
-            return false;
-        }
-
-        $host = parse_url($url, PHP_URL_HOST);
-
-        if (! $host) {
-            return false;
-        }
-
-        $internalHost = parse_url((string) config('app.url'), PHP_URL_HOST);
-
-        return strcasecmp($host, (string) $internalHost) !== 0;
-    }
-
-    /**
-     * 取 URL 对应的短 hash（确定性：同一 URL 复用同一条记录，并发安全）。
-     */
-    public function hashFor(string $url): string
-    {
-        return Cache::remember('go.hash.'.md5($url), now()->addDay(), function () use ($url) {
-            $hash = substr(hash('sha256', $url), 0, 10);
-
-            for ($i = 0; $i < 3; $i++) {
-                try {
-                    Redirect::create(['hash' => $hash, 'target_url' => $url]);
-
-                    return $hash;
-                } catch (UniqueConstraintViolationException) {
-                    $existing = Redirect::where('target_url', $url)->first();
-
-                    if ($existing) {
-                        return $existing->hash;
-                    }
-
-                    $hash = substr(hash('sha256', $url.$i), 0, 10);
-                }
-            }
-
-            return $hash;
-        });
-    }
-}

app/Filament/Resources/RedirectResource.php

@@ -1,90 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Filament\Resources;
-
-use App\Filament\Resources\RedirectResource\Pages\ListRedirects;
-use App\Models\Redirect;
-use BackedEnum;
-use Filament\Actions\Action;
-use Filament\Actions\DeleteAction;
-use Filament\Resources\Resource;
-use Filament\Schemas\Schema;
-use Filament\Support\Icons\Heroicon;
-use Filament\Tables\Columns\TextColumn;
-use Filament\Tables\Table;
-
-class RedirectResource extends Resource
-{
-    protected static \UnitEnum|string|null $navigationGroup = '管理';
-
-    protected static ?string $model = Redirect::class;
-
-    protected static string|BackedEnum|null $navigationIcon = Heroicon::OutlinedArrowUturnRight;
-
-    protected static ?string $navigationLabel = '外链中转';
-
-    protected static ?string $pluralModelLabel = '外链中转';
-
-    public static function form(Schema $schema): Schema
-    {
-        return $schema;
-    }
-
-    public static function table(Table $table): Table
-    {
-        return $table
-            ->columns([
-                TextColumn::make('hash')
-                    ->label('短码')
-                    ->badge()
-                    ->color('gray'),
-                TextColumn::make('target_url')
-                    ->label('目标地址')
-                    ->limit(50)
-                    ->copyable()
-                    ->searchable(),
-                TextColumn::make('clicks')
-                    ->label('点击量')
-                    ->numeric()
-                    ->sortable(),
-                TextColumn::make('status')
-                    ->label('状态')
-                    ->badge()
-                    ->formatStateUsing(fn ($state) => $state === 'active' ? '启用' : '停用')
-                    ->color(fn ($state) => $state === 'active' ? 'success' : 'danger'),
-                TextColumn::make('last_clicked_at')
-                    ->label('最后点击')
-                    ->dateTime('Y-m-d H:i')
-                    ->placeholder('—')
-                    ->sortable(),
-                TextColumn::make('created_at')
-                    ->label('创建时间')
-                    ->dateTime('Y-m-d H:i')
-                    ->toggleable(isToggledHiddenByDefault: true),
-            ])
-            ->filters([
-                \Filament\Tables\Filters\SelectFilter::make('status')
-                    ->label('状态')
-                    ->options(['active' => '启用', 'disabled' => '停用']),
-            ], \Filament\Tables\Enums\FiltersLayout::AboveContent)
-            ->recordActions([
-                Action::make('toggle')
-                    ->label(fn (Redirect $record) => $record->isActive() ? '停用' : '启用')
-                    ->color(fn (Redirect $record) => $record->isActive() ? 'danger' : 'success')
-                    ->action(fn (Redirect $record) => $record->update(['status' => $record->isActive() ? 'disabled' : 'active'])),
-                DeleteAction::make(),
-            ])
-            ->recordUrl(null)
-            ->recordAction(null)
-            ->defaultSort('clicks', 'desc');
-    }
-
-    public static function getPages(): array
-    {
-        return [
-            'index' => ListRedirects::route('/'),
-        ];
-    }
-}

app/Filament/Resources/RedirectResource/Pages/ListRedirects.php

@@ -1,13 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Filament\Resources\RedirectResource\Pages;
-
-use App\Filament\Resources\RedirectResource;
-use Filament\Resources\Pages\ListRecords;
-
-class ListRedirects extends ListRecords
-{
-    protected static string $resource = RedirectResource::class;
-}

app/Models/Redirect.php

@@ -1,29 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Model;
-
-class Redirect extends Model
-{
-    protected $fillable = [
-        'hash', 'target_url', 'clicks', 'status', 'last_clicked_at',
-    ];
-
-    protected $casts = [
-        'last_clicked_at' => 'datetime',
-    ];
-
-    public function isActive(): bool
-    {
-        return $this->status === 'active';
-    }
-
-    public function hit(): void
-    {
-        $this->increment('clicks');
-        $this->update(['last_clicked_at' => now()]);
-    }
-}

app/Support/helpers.php

@@ -43,19 +43,20 @@ if (! function_exists('blog_setting')) {
     }
 }
 
-if (! function_exists('go_url')) {
+if (! function_exists('tracked_url')) {
     /**
-     * 外链中转：站外链接改写为 /go/{hash}（点击统计/拦截），站内链接原样返回。
+     * 外链追踪钩子：核心视图统一调用，由插件（外链中转）改写为 /go/{hash}；
+     * 插件停用时原样返回。站内链接等由插件自行判断。
      */
-    function go_url(string $url): string
+    function tracked_url(string $url): string
     {
-        return app(\App\Blog\Services\UrlRedirector::class)->goUrl($url);
+        return app(\App\Blog\Support\PluginManager::class)->applyFilters('link.redirect', $url);
     }
 }
 
 if (! function_exists('comment_body')) {
     /**
-     * 评论正文：转义 + 自动链接 URL（走 /go 中转，nofollow）。
+     * 评论正文：转义 + 自动链接 URL（经 tracked_url 走中转，nofollow）。
      */
     function comment_body(string $text): string
     {
@@ -63,7 +64,7 @@ if (! function_exists('comment_body')) {
 
         $text = preg_replace_callback(
             '#(https?://[^\s<>"\'()]+)#i',
-            fn (array $m) => '<a href="'.e(go_url($m[1])).'" target="_blank" rel="nofollow noopener">'.$m[1].'</a>',
+            fn (array $m) => '<a href="'.e(tracked_url($m[1])).'" target="_blank" rel="nofollow noopener">'.$m[1].'</a>',
             $text
         );